21034004333 has 2 divisors, whose sum is σ = 21034004334. Its totient is φ = 21034004332.

The previous prime is 21034004309. The next prime is 21034004347. The reversal of 21034004333 is 33340043012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11118226249 + 9915778084 = 105443^2 + 99578^2 .

It is a cyclic number.

It is not a de Polignac number, because 21034004333 - 2¹⁶ = 21033938797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21034004299 and 21034004308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21034004363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517002166 + 10517002167.

It is an arithmetic number, because the mean of its divisors is an integer number (10517002167).

Almost surely, 2^21034004333 is an apocalyptic number.

It is an amenable number.

21034004333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21034004333 is an equidigital number, since it uses as much as digits as its factorization.

21034004333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21034004333 its reverse (33340043012), we get a palindrome (54374047345).

The spelling of 21034004333 in words is "twenty-one billion, thirty-four million, four thousand, three hundred thirty-three".